Mathematics In Physics Test - 5

The three vectors OA, OB and OC have the same magnitude R. Then the sum of these vectors have magnitude -

A truck travelling due north with 20m/s turns towards west and travels at the same speed. Then the change in velocity is -

A particle is moving in a circle of radius r centered at O with constant speed v. The change in velocity moving from A to B (∠AOB = 40°) is -

What is the resultant of three coplanar forces: 300 N at 0°, 400 N at 30° and 400 N at 150° ?

Two forces, F₁, F₂ are acting on a body. One force is doubled of the other force and the resultant is equal to the greater force. Then the angle between the two forces is -

If the angle between vector a and b is an acute angle, then the difference a−b is -

What displacement must be added to the displacement  to give a displacement of 7.0 m pointing in the x-direction?

A child pulls a box with a force of 200 N at an angle of 60° above the horizontal. Then the horizontal and vertical components of the force will be:

A man rows a boat at a speed of 18 km in the northwest direction. The shoreline makes an angle of 15° south of west. The component of the velocity of the boat along the shoreline is:

A bird moves from point (1, -2) to (4, 2). If the speed of the bird is 10 m/sec, then the velocity vector of the bird is: